Spark plug



S 'PARK PLUG Filed March 16. 1923 Patented Sept. 2, 1924.

PATENT OFFICE.

SULLIVAQI PAIIHERI, OI PLANTSVILLE, CONNECTICUT.

' SPARK PLUG.

- Application filed Iarch 16, 1923; Serial m.s25,441.

To all whom it mwy'covwem:

Be it known that I, SULLIVAN PALMnnna citizen of the United States, residing at Plantsville, in the county of Hartfordand 5 State of Connecticut, have invented a new and useful Improvement in Spark Plugs; and I do hereby declare the following, when taken in connection with the accompanyingdrawings and the characters of reference .0 marked thereon, to be a full, c1ear,-and exact description of the same, and which said drawings constitute part of this application, and re resent,'1n s 5 spark plug constructed in accordance with.

m* invention.

- ig. 2 a side view of the housing-cap detached.

- This invention relates to improvement'in' s ark plu and articularl to lugs rov ided at tlieir lo wer ends with chamfiel's within which the contact ortions, of the electrodes are housed, the object of this invention being asimple arrangement of parts,

5 whereby a cap may be readily fitted over the inner end of a spark plug and provides the desired housing, and the invention consists in the construction as hereinafter desired and particularly recited in the claim. v

In illustrating my invention, I have shown it applied to a conventional formiof spark plug, including a casing 5-, providedat its I more or less corrosion takes place. Fig. 1 a s1 e view, partly 1n s'ectlon, of a] with a slot.

lower end with a transverse, fixed electrode 6, which is in the form of a'pin, the ends of which project beyond the outer side walls of the lower end of the casing, so as to enter bayonet-slots 7 opening out of the upper end of a cap 8, which is provided, near its lower end, on opposite sides, with slots 9. The fixedv electrode 6 thus forms a support for 0 the housin -cap, so that the cap may be readil app ied or removed when desired, somet ing which is difiicult to do if the cap has a, Screw connection with the plug, as

I claim: A- spark plug provided with a transverse pin-like electrode permanently mounted in the inner end of te plug and longer than the diameter of the plug, so as to project beyond opposite sides thereof, a hOllSlIl -cap formed with bayonet slots engaging wit the projecting ends of the said electrodes, wherey the cap is locked in lace by said electrode, the said cap also ormed on one side In'testimonywhereof, I have signed this specification in the presence of tw'o subscribing'witnesses. v

. SULLIVAN PALMERI. Witnesses:

, RALrH MONTE,

'Tnoms F. Wnncn. 

